My G4 iBook is going on 4 years old. It's served me well, but I think it's showing it's age. The OS (10.4.11) has been running significantly slower in the last few months, and the time it takes to work through pretty much anything now is unbearable. I couldn't find any easy way to back up my files (no, I don't have an legit backup system in place- I want to change that) so I just copied them all on flash memory over to my PC. I'm about ready to bite the bullet and do a clean install. Hopefully that will breathe some new life into the machine. Is there anything I should do or check before I do that? Any reason to not do a clean install in the first place?